Improvements in Inhalers for use in Administering Nitrous Oxide Anaesthetics.

摘要

2012. Strangways, L., and Plucknett & Co., C. J. Jan. 27. Inhalers.-A nitrous-oxide inhaler comprises a face-piece c provided with an exhaling-valve c1, and attached by means of a bayonet-joint to an angle-piece a fitted with a removable tubular air and gas valve f operated by a removable handle g. The bag mount b is fitted with a removable butterfly valve d. operated by a thumb-piece e and provided with a flap valve m which serves as an inhaling-valve when the butterfly disk is in the closed position. The spindle d' of the valve serves also as part of the bayonet - joint whereby the bag mount is attached to the angle-piece.